Workpiece automatic centering fixture for vertical lathe

Abstract

The utility model discloses a vertical lathe workpiece automatic centering fixture belongs to centering fixture technical field, include: vertical lathe's processing platform, the inner chamber of processing platform can be up and down lift and is provided with the mounting seat, the periphery fixed embedding of mounting seat top is equipped with the deflection motor, the output shaft fixed of deflection motor has the connecting rod, the utility model discloses four groups of independent operation's deflection motor to the connecting rod is driven to deflect, then the connecting rod drives the clamping piece to deflect and moves, can utilize the clamping piece to the workpiece of being held to push, cooperate laser displacement sensor and carry out scanning identification to the outer contour of workpiece, utilize computer and calculate the position of center (or processing position), control deflection motor and first electric push rod operation, accurate reason movable seat adjusts and clamps workpiece, ensure that the center (or processing position) of workpiece is located below lathe tool, is suitable for the workpiece of different appearance, thereby solves traditional centering fixture poor adaptability's problem.

Description

Technical Field

[0001] This utility model relates to the field of centering fixture technology, specifically an automatic centering fixture for workpieces on a vertical lathe. Background Technology

[0002] Vertical lathes are mainly used to process large and heavy workpieces with large diameters and short lengths, as well as workpieces that are difficult to clamp on horizontal lathes. If the turning diameter is sufficient, workpieces that are too heavy are not easy to clamp on horizontal lathes, and their own weight affects the machining accuracy. Vertical lathes can solve the above problems.

[0003] When machining workpieces on a traditional vertical lathe, the workpiece needs to be centered. When clamping workpieces with regular shapes, symmetrical fixtures can be used to clamp and center them. However, for some asymmetrical workpieces, traditional centering fixtures cannot be centered, resulting in insufficient adaptability of traditional centering fixtures. Utility Model Content

[0004] The purpose of this invention is to provide an automatic workpiece centering fixture for vertical lathes. It scans the outer contour of the workpiece using a laser displacement sensor, and then automatically calculates the position of the center (or machining position) using a computer. The workpiece is moved using four sets of independently operating clamping components, and the workpiece is simultaneously limited to complete the automatic adjustment of the workpiece center (or machining position). It can not only meet the needs of workpieces with regular shapes, but also be suitable for processing irregular workpieces, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic workpiece centering fixture for a vertical lathe, comprising: The machining table of a vertical lathe; The inner cavity of the processing table is equipped with a mounting base that can be raised and lowered. A deflection motor is fixedly embedded around the top of the mounting base. A connecting rod is fixed to the output shaft of the deflection motor. The top of the connecting rod extends through to the top of the processing table and is fixed with a clamping component. A laser displacement sensor for scanning the outer contour of the workpiece is also installed on the vertical lathe above the machining table.

[0006] Preferably, the clamping member includes a fixed seat fixed on the connecting rod, a movable seat movably disposed at the end of the fixed seat away from the connecting rod, a first electric actuator fixedly embedded in the inner cavity of the fixed seat, and the piston rod of the first electric actuator passing through to the outside of the fixed seat and fixedly connected to one end of the movable seat.

[0007] Preferably, a second electric actuator is fixed to the bottom of the processing table, the piston rod of the second electric actuator passes through the inner cavity of the processing table and is fixedly connected to the bottom of the mounting base, and a storage groove for storing the clamping parts is provided on the top of the processing table.

[0008] Preferably, the mounting base has four sets of through holes, and a sliding sleeve is fixedly embedded in the through holes. A limiting slide rod is slidably arranged in the sliding sleeve, and both ends of the limiting slide rod are fixed to the inner wall of the processing table.

[0009] Preferably, four sets of limiting rods are fixed to the end of the fixed seat away from the connecting rod, and the end of the limiting rod away from the connecting rod passes through a limiting hole opened on the movable seat.

[0010] Preferably, the movable seat has grooves on both sides of the end away from the fixed seat, and a movable component is rotatably disposed in the groove, with one side of the movable component extending to the outside of the movable seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses four independently operating deflection motors to drive the connecting rod to deflect. When the connecting rod drives the clamping component to deflect and move, the clamping component can push the workpiece to be clamped. In conjunction with a laser displacement sensor, the outer contour of the workpiece is scanned and identified. The computer calculates the position of the center (or machining position) and controls the operation of the deflection motor and the first electric push rod. The movable seat precisely adjusts and clamps the workpiece, ensuring that the center (or machining position) of the workpiece is located below the lathe tool. This invention is suitable for workpieces of different shapes, thereby solving the problem of poor adaptability of traditional centering fixtures.

[0012] 2. This utility model has a movable component movably arranged on the movable seat, which facilitates the contact between the movable component and the workpiece by rotating the movable component, thereby increasing the contact points between the clamping component and the workpiece and improving the stability of workpiece clamping. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional three-dimensional structural diagram of the processing table of this utility model; Figure 3 This is a three-dimensional structural diagram of the clamping component of this utility model; Figure 4 This is a cross-sectional three-dimensional structural diagram of the clamping component of this utility model.

[0014] The following are the labels in the diagram: 1. Machining table; 2. Mounting base; 3. Deflection motor; 4. Connecting rod; 5. Clamping component; 51. Fixed base; 52. Movable base; 53. First electric push rod; 6. Laser displacement sensor; 7. Second electric push rod; 8. Storage slot; 9. Sliding sleeve; 10. Limiting slide rod; 11. Limiting rod; 12. Limiting hole; 13. Movable component. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides, for example Figures 1-4 The illustrated automatic workpiece centering fixture for a vertical lathe includes: Machining table 1 of a vertical lathe; The inner cavity of the processing table 1 is equipped with a mounting base 2 that can be raised and lowered. A deflection motor 3 is fixedly embedded around the top of the mounting base 2. A connecting rod 4 is fixed to the output shaft of the deflection motor 3. The top of the connecting rod 4 extends through to the top of the processing table 1 and is fixed with a clamping piece 5. A laser displacement sensor 6 for scanning the outer contour of the workpiece is also installed on the vertical lathe above the machining table 1. Four independently operating deflection motors 3 drive the connecting rod 4 to deflect. When the connecting rod 4 drives the clamping member 5 to deflect and move, the clamping member 5 can push the workpiece to be clamped. In conjunction with the laser displacement sensor 6, the outer contour of the workpiece is scanned and identified. The computer calculates the position of the center (or machining position) and controls the operation of the deflection motor 3 and the first electric push rod 53. The movable seat 52 is used to precisely adjust and clamp the workpiece, ensuring that the center (or machining position) of the workpiece is located below the lathe tool. This is suitable for workpieces of different shapes, thus solving the problem of poor adaptability of traditional centering fixtures.

[0017] The deflection motor 3 adopts the S50.U0C / K-D1 series: a piezoelectric deflection stage for one-dimensional θx-axis deflection, with a load capacity of up to 60kg and a deflection angle of ±0.25mrad. It uses a capacitive closed-loop sensor with a resolution of up to 10nrad and can operate at high frequency under a 20kg load. It is mainly used for large-load deflection motion experiments, such as spatial disturbance simulation. Laser displacement sensor principle 6: A laser beam is emitted onto the surface of an object, and the reflected light is captured by a receiver (usually a CCD or CMOS sensor). Based on the position of the reflected light point on the receiver, the distance to that point on the object's surface is calculated using trigonometric relationships. By moving the workpiece under the sensor, point-by-point measurements are taken to form a contour line.

[0018] Among them, such as Figure 3-4 As shown: The clamping component 5 includes a fixed seat 51 fixed on the connecting rod 4. A movable seat 52 is movably disposed at the end of the fixed seat 51 away from the connecting rod 4. A first electric push rod 53 is fixedly embedded in the inner cavity of the fixed seat 51. The piston rod of the first electric push rod 53 passes through to the outside of the fixed seat 51 and is fixedly connected to one end of the movable seat 52. By setting the structure of the movable component 13, it is convenient to drive the movable seat 52 to separate from the fixed seat 51 through the first electric push rod 53, adjust the length of the clamping component 5, and cooperate with the deflection of the connecting rod 4 to perform fixed-point clamping of asymmetrical workpieces, avoiding the inability of traditional synchronous moving clamps to center and clamp asymmetrical workpieces.

[0019] Furthermore, such as Figure 2 As shown: A second electric push rod 7 is fixed at the bottom of the processing table 1. The piston rod of the second electric push rod 7 passes through the inner cavity of the processing table 1 and is fixedly connected to the bottom of the mounting base 2. A storage slot 8 for storing the clamping part 5 is opened at the top of the processing table 1. The mounting base 2 can be adjusted up and down by the second electric push rod 7 to realize the transfer of the clamping part 5 inside and outside the storage slot 8, so as to avoid the clamping part 5 affecting the implantation of the workpiece.

[0020] Preferred, such as Figure 2 As shown: The mounting base 2 has four sets of through holes, and a sliding sleeve 9 is fixedly embedded in the through holes. A limiting slide rod 10 is slidably installed in the sliding sleeve 9. Both ends of the limiting slide rod 10 are fixed to the inner wall of the processing table 1. Through the cooperation of the sliding sleeve 9 and the limiting slide rod 10, the mounting base 2 can be easily limited to prevent the mounting base 2 from shaking when it moves up and down in the inner cavity of the processing table 1, which would affect the clamping accuracy of the clamping part 5.

[0021] It is worth noting that, such as Figure 3 As shown: Four sets of limiting rods 11 are fixed at the end of the fixed seat 51 away from the connecting rod 4. The end of the limiting rod 11 away from the connecting rod 4 passes through the limiting hole 12 opened on the movable seat 52. Through the cooperation of the limiting rod 11 and the limiting hole 12, the movable seat 52 is conveniently limited, maintaining the stability of the movable seat 52 and the fixed seat 51, and preventing the movable seat 52 from shaking after telescopic movement.

[0022] In a further preferred embodiment, such as Figure 4 As shown: The movable seat 52 has grooves on both sides of the end away from the fixed seat 51, and a movable part 13 is rotatably arranged in the groove. One side of the movable part 13 extends to the outside of the movable seat 52. By movably arranging the movable part 13 on the movable seat 52, the rotation of the movable part 13 can be used to make the movable part 13 fit with the workpiece, increase the contact points between the clamping part 5 and the workpiece, and thus improve the stability of clamping the workpiece.

[0023] In practical use, the workpiece to be processed is roughly placed on the top of the processing table 1. Then, the laser displacement sensor 6 above scans the workpiece, and the computer calculates the outline and center position of the workpiece. Subsequently, the second electric push rod 7 drives the mounting base 2 to move upward, so that the clamping part 5 is moved out of the storage slot 8. Then, the four sets of deflection motors 3 operate independently, and the deflection motors 3 drive the connecting rod 4 to rotate. Then, the connecting rod 4 drives the fixed base 51 to deflect. Then, the first electric push rod 53 pushes the movable base 52, so that the movable base 52 moves away from the fixed base 51, extending the length of the clamping part 5. The workpiece is moved by the deflection and extension of the movable base 52. The position of the workpiece is adjusted and fixed by the four sets of clamping parts 5 to maintain the stability of the workpiece. It can not only center workpieces with regular shapes, but also clamp and center asymmetrical workpieces.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic workpiece centering fixture for a vertical lathe, characterized in that, include: Machining table of vertical lathe (1); The inner cavity of the processing table (1) is equipped with a mounting base (2) that can be raised and lowered. A deflection motor (3) is fixedly embedded around the top of the mounting base (2). A connecting rod (4) is fixed to the output shaft of the deflection motor (3). The top of the connecting rod (4) extends through to the top of the processing table (1) and is fixed with a clamping piece (5). A laser displacement sensor (6) for scanning the outer contour of the workpiece is also installed on the vertical lathe above the processing table (1).

2. The automatic workpiece centering fixture for a vertical lathe according to claim 1, characterized in that: The clamping member (5) includes a fixed seat (51) fixed on the connecting rod (4). A movable seat (52) is movably provided at one end of the fixed seat (51) away from the connecting rod (4). A first electric push rod (53) is fixedly embedded in the inner cavity of the fixed seat (51). The piston rod of the first electric push rod (53) passes through to the outside of the fixed seat (51) and is fixedly connected to one end of the movable seat (52).

3. The automatic workpiece centering fixture for a vertical lathe according to claim 1, characterized in that: The bottom of the processing table (1) is fixed with a second electric push rod (7). The piston rod of the second electric push rod (7) passes through the inner cavity of the processing table (1) and is fixedly connected to the bottom of the mounting base (2). The top of the processing table (1) is provided with a storage groove (8) for storing the clamping part (5).

4. The automatic workpiece centering fixture for a vertical lathe according to claim 1, characterized in that: The mounting base (2) has four sets of through holes, and a sliding sleeve (9) is fixedly embedded in the through holes. A limiting slide rod (10) is slidably installed in the sliding sleeve (9), and both ends of the limiting slide rod (10) are fixed on the inner wall of the processing table (1).

5. The automatic workpiece centering fixture for a vertical lathe according to claim 2, characterized in that: The fixed seat (51) is fixed with four sets of limiting rods (11) at the end away from the connecting rod (4). The end of the limiting rod (11) away from the connecting rod (4) passes through the limiting hole (12) on the movable seat (52).

6. The automatic workpiece centering fixture for a vertical lathe according to claim 2, characterized in that: The movable seat (52) has grooves on both sides of the end away from the fixed seat (51), and a movable part (13) is rotatably arranged in the groove. One side of the movable part (13) extends to the outside of the movable seat (52).

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